/******************************************************************************* 
 * Copyright (c) 2002 Boris Pruessmann and others.
 * All rights reserved.   This program and the accompanying materials
 * are made available under the terms of the Common Public License v0.5
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v05.html
 * 
 * Contributors:
 *    Boris Pruessmann - Initial implementation
 ******************************************************************************/
package net.sourceforge.perforce.ui;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import net.sourceforge.perforce.core.ISubmitValidator;
import net.sourceforge.perforce.core.PerforceException;
import net.sourceforge.perforce.core.api.IPerforceServer;
import net.sourceforge.perforce.core.api.IWhereResult;
import net.sourceforge.perforce.core.internal.api.ChangeSpec;

import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.swt.widgets.Display;

/**
  * @version $Revision: 251 $
  * @author  <a href="mailto:bpruessmann@users.sourceforge.net">Boris Pruessmann</a>
  */
public class SubmitValidator implements ISubmitValidator 
{
	// ------------------------------------------------------------------------------ Public Methods
	
	/** @see ISubmitValidator#validateChangeSpec(IPerforceServer, ChangeSpec) */
	public IStatus validateChangeSpec(IPerforceServer server, ChangeSpec changeSpec) 
	{
		IPreferenceStore store = PerforceUIPlugin.getPlugin().getPreferenceStore();
		if (!store.getBoolean(IPerforceUIConstants.PREF_CHECK_CHANGELIST_FOR_WARNINGS_AND_ERROR))
		{
			return new Status(Status.OK, PerforceUIPlugin.ID, 0, "", null);            //$NON-NLS-1$
		}
		
		try
		{
			Set resources = new HashSet();
			
			IWorkspaceRoot root = PerforceUIPlugin.getWorkspace().getRoot();
			String[] files = changeSpec.getFiles();
			for (int i = 0; i < files.length; i++)
			{
				IWhereResult whereResult = server.where(files[i]);
				
				Path location = new Path(whereResult.getLocalFilename());
				IResource resource = root.getFileForLocation(location);
				if (resource != null && resource.exists())
				{
					resources.add(resource);
				}
			}
			
			int errors = 0;
			int warnings = 0;
			for (Iterator it = resources.iterator(); it.hasNext();)
			{
				IResource resource = (IResource) it.next();
				IMarker[] markers = 
					resource.findMarkers(IMarker.PROBLEM, true, IResource.DEPTH_ZERO);
				for (int i = 0; i < markers.length; i++)
				{
					Integer severity = (Integer) markers[i].getAttribute(IMarker.SEVERITY);
					switch (severity.intValue())
					{
						case IMarker.SEVERITY_ERROR:
							errors++;
							break;
							
						case IMarker.SEVERITY_WARNING:
							warnings++;
							break;
							
						default:
							break;
					}
				}
			}
			
			if (errors > 0 || warnings > 0)
			{
				final String message = 
					"The changelist you are going to submit contains:\n\n" +
					warnings + " warning(s) and " +
					errors + " error(s).\n\n" +
					"Do you really want to continue?";
				
				final Display display = Display.getDefault();				
				final boolean[] result = { false };
				display.syncExec(new Runnable() 
				{
					public void run() 
					{
						result[0] = MessageDialog.openConfirm(
							display.getActiveShell(), 
							"Perforce Team Provider", 
							message);
					}
				});
				
				if (!result[0])	
				{
					return new Status(
						Status.ERROR, 
						PerforceUIPlugin.ID, 
						0, 
						"Submit has been aborted by the user.",                        //$NON-NLS-1$
						null);
				}
			}
			
			
			return new Status(Status.OK, PerforceUIPlugin.ID, 0, "", null);            //$NON-NLS-1$
		}
		catch (CoreException e)
		{
			return e.getStatus();
		}
		catch (PerforceException e)
		{
			return e.getStatus();
		}
	}
}
